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Applio vs Altered Studio: catalog facts
Applio	Altered Studio
Free Free and open source under the MIT licence.	Freemium Commercial product; check the Altered site for current plans and prices.
Windows, macOS, Linux	Windows, macOS, Web
Voice conversion, real-time voice changing and model training in one app Runs locally with no account and no telemetry	Speech-to-speech conversion keeps the timing and inflection of your performance Curated library of voices plus custom voices
Training voice models needs capable hardware Converting someone else's voice raises consent and copyright questions	Proprietary software Pricing and plan limits are not clear from the homepage
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.